Lighting-fixture



C. R. LEIMECKE.

LIGHTING FIXTURE APPLICATION FILED AUG.22, 1919.

1,383,831 Patented July 5, 1921.

2 SHEETS-SHEET l.

1 \/2 /4 2&9: 4 5

C. R. LEIMECKE.

LIGHTING FIXTURE. 7

APPLICATION FILED AUG.22, 1919.

1,383,831 Patented July 5, 1921.

v 2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

CHARLES R. LEIMECKE, OF ST. CHARLES, ILLINOIS.

LIGHTING-FIXTURE Specification of Letters ratent.

Application filed August 22, 1919. Serial No. 319,086.

To all whom it may concern: 7

Be it known that I, CHARLES R. LEI- MECKE, a citizen of the United States, residing at St. Charles, Illinois, have invented a certain new and useful Improvement in Lighting-Fixtures, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which designed for the urpose of utilizing to the best advantage, t e reflected rays of practically all the light produced by the electric lamp or other source of light associated with the fixture, and to effect a uniform distribution of such reflected light rays.

The principal objects of my invention are, to provide a relatively simple lighting fixture, the construction of which is such that it will enable it to be easily and cheaply manufactured and readily assembled or taken apart; to provide a lighting fixture having a reflecting element constructed so as to entirely eliminate shadows on the ceiling immediately adjacent to the fixture; and, further, to provide a lighting 'fixture bowl, the upper and lower portions of which are translucent and said translucent portions being separated by an annular area of clear, wholly transparent, glass or like material and which arrangement ermits direct rays'of light from the lamp within the bowl to pass radially outward in a practically horlzontalplane with very little loss and these direct rays combining with the reflected rays to effect a uniform distribution of light throughout the room in which the fixture is located.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanyin drawings, in whichigure 1 is a vertical section taken through the center of. a lighting fixture of in improved construction.

Tig. 2 is a plan view looking against the underside of the reflecting member of the fixture.

Fig. 3 is a plan view of a bridge or spider that is utilized in connection with the reflector.

Fig. 4 is a diagrammatic view of my improved fixture with dotted lines showing,

the direction of travel of direct and reflected light rays. 7

Referring by numerals to the accompanying drawings, it will be seen that tl1e re-- flector of my improved fixture is formed of relatively thin material, preferably sheet metal, the central portion of which is pressed downwardly into inverted frustoconical form, as designated by 10, there being an opening 11 formed at the lower end of said depending portion, which opening is for the purpose of accommodating a part of the lamp or lampreceiving socket associated with the fixture. The under surface of this depending central portion. '10 is curved gradually outward, as illustrated in Patented July 5, 1921.

Fig. 1,, and said surface is polished or,

finished to form a reflecting surface.

That portion ofthe disk or section of the material from which the reflector is formed immediately adjacent to its outer edge is pres'sedto form a plurality'of concentrically disposed ribs or beads12, the inner one of which occupies a plane a substantial distance below that occupied by the marglnal edge of the disk and from the" lower inner one of said ribs or heads the material from which the reflector is formed v y Y extends inwardly a short distance to form a substantially flat ring 13. This ring oc-l cupies a horizontal plane a short distance below the plane occupied by the outer edge of the inverted frusto-conical portion 10 and connecting the inner" edge of ring 13 with the outer edge of the portion 10 are three or more relatively narrow strips of material 14. The arcuate'openings 15 between these bridging portions 14 constitute an annular opening in the reflector portion of the fixture and which opening permits the passage of certain light rays from the lamp within the fixture, consequently eliminating the formation of certain shadows, and which action is hereinafter more fully described.

Positioned on top of the inverted frustoconical portion of the reflector is a bridge or spider of cast or pressed metal, the same comprising a. ring 16 having a diametrically arqmged plate 17 and there being a series of arms 18. extending radially outward from said ring. The outer portions of these arms are fixed in any suitable manner'to theouter portion of the inverted frusto-conical member 10 and the plate 17 that extends across the ring is perforated to receive a stud or bolt 19 which depends from the outlet box in the ceiling. This plate 17 is also perforated to receive bolts or like fastening devices 20 and which latter support the receptacle or socket 21 for the electric lamp 22. This receptacle or socket is formed of porcelain or suitable insulating material andits lower end terminates immediately adjacent to the opening 11 at the lower end of the inverted frusto-conical reflecting member 10.

Secured to the ring portion 13 of the reflector and depending therefrom are a plurality of chains 22 and detachably connected to the lower ends of said chains are hooks 23 that are secured to the upper portion of a bowl 24.. This bowl is preferably formed of glass and its upper and lower portions are made translucent in any suitable manner. A horizontally disposed annular portion 25 of this bowl is formed of clear transparent glass or the like, said transparent portion being disposed in practically the same horizontal plane with the filament of the lamp;

1 consequently direct rays of light will be permitted to pass radially outward in all directions for a limited vertical space between the translucentportions of the bowl.

In my improved fixture, the bowl 24 provided with the transparent portion 25, the lamp 22 and the member 10 having the curved reflecting surface, are disposed in relative positions so as to obtain maximum results from the standpoint of illumination. The bowl having the upper and lower translucent portions with a clear space between, permits direct light rays from the lamp to pass onto the curved surface of the reflector 10 and these rays are directed outwardly and downwardly in uniform volume, thereby properly illuminating the entire area or space below and around the fixture. The clear space 25 in the bowl perm-its direct light rays to pass horizontally outward from the bowl with very little loss of illuminating power and these direct light rays com-' bine with the reflected rays in producing maximum illumination with the entire absence of shadows.

The translucent lower portion of the bowl thoroughly difi'uses the light rays passing downwardly from the lamp and which rays would otherwise come directly into the range of vision. A portion of the light rays passing through the translucent upper portion of the bowl pass through the openings 15 which surround the curved surface of the reflector,

10, thus illuminating that portion of theceiling that is immediately adjacent to the upper part of the fixture and eliminating the production of shadows on said ceiling, particularlywhen the upper portion of the fixture is suspended a short distance below'the ceiling.

By curving or beveling the outer portion of the upper member of the fixture or that portion provided with the beads 12, the formation of shadows immediately adjacent to the outer edge of the top portion of the fixture is eliminated and particularly when the upper member is placed directly against or immediately-adj acent to the ceiling. (See Fig. 4:).

It will be understood that my improved fixture may be arranged with the upper member on which the reflector 10 is formed directly against the ceiling or the entire fixture may be suspended a suitable distance below the ceiling by means of rods, chains, or the like, and in both instances there is a uniform distribution of light throughout the room in which the fixture is positloned and at the same time an entire absence of shadows on the ceiling from'which the fixture is suspended.

.A- semi-indirect ceiling fixture of my improved construction is comparatively simple, can be readily assembled or taken apart, and is very effective in performing its intended functions.

While I have shown the preferred embodiments of my invention, it will be understood that minor changes of construction and arrangement of parts may be made, without departing from the scope and spirit of the invention, as set forth in the appended claims.

Iclaim:

1. A semi-indirect lighting fixture comprising an upper member having formed thereon a centrally arranged depending reflector, the surface of which is curved, there being openings formed in said upper mem-' ber around said reflector, a lamp secured to said upper member and disposed below the reflector, and alight diffusing bowl inclosing said source of light, said bowl having translucent upper and lower portions that are separated by a transparent portion.

2. In a semi-indirect lighting fixture, an upper member formed of pressed sheet metal, the marginal edge of which is inclined upwardly and outwardly, the central portion of said member being extended downwardly to form an annular reflector having a curved surface, and there bein circularly disposed openings formed in said member around saiddepending reflector.

3. In a semi-indirect lighting fixture, an upper member formed of pressed sheet metal, the marginal edge of which is..inclined upwardly and outwardly, the central portion of said member being extended downwardly to form an annular reflector having a curved surface, there being a series of circularly disposed openings in said member around said depending reflector, a lamp connected to said upper member and disposed below the depending reflector, and a light diffusing bowl inclosing said lamp.

4. In a semi-indirect lighting fixture, an upper member formed of ressed sheet metal, the marginal edge of WlllCh is inclined upwardly and outwardly, the central portion of said member being extended downwardly to form an annular reflector having a curved surface, there being a series of circularly disposed openings in said member around said depending reflector, a lamp connected to said upper member and disposed below the depending reflector, a light diifusing bowl inclosing said lamp, said light diflusing bowl being provided with upper and lower translucent portions, and a transparcut portion disposed between said translucent portions.

5. A semi-indirect lighting fixture comprising an upper member having formed thereon a centrally arranged depending reflector, the surface of which is curved, there being openings formed in said upper member around said reflector, a lamp secured to said upper member and disposed below the reflector, and a light diffusing bowl inclosing said source of light, said bowl having translucent upper and lower portions that are separated by a transparent portion, said transparent portion being disposed opposite the lamp filament.

In testimony whereof I hereunto afiix my signature this 18th day of August, 1919.

CHARLES R. LEIMECKE. 

